Dan Williams 1501efadc5 md/raid: only permit hot-add of compatible integrity profiles ... It is not safe for an integrity profile to be changed while i/o is in-flight in the queue. Prevent adding new disks or otherwise online spares to an array if the device has an incompatible integrity profile. The original change to the blk_integrity_unregister implementation in md, commmit c7bfced9a6 "md: suspend i/o during runtime blk_integrity_unregister" introduced an immediate hang regression. This policy of disallowing changes the integrity profile once one has been established is shared with DM. Here is an abbreviated log from a test run that: 1/ Creates a degraded raid1 with an integrity-enabled device (pmem0s) [ 59.076127] 2/ Tries to add an integrity-disabled device (pmem1m) [ 90.489209] 3/ Retries with an integrity-enabled device (pmem1s) [ 205.671277] [ 59.076127] md/raid1:md0: active with 1 out of 2 mirrors [ 59.078302] md: data integrity enabled on md0 [..] [ 90.489209] md0: incompatible integrity profile for pmem1m [..] [ 205.671277] md: super_written gets error=-5 [ 205.677386] md/raid1:md0: Disk failure on pmem1m, disabling device. [ 205.677386] md/raid1:md0: Operation continuing on 1 devices. [ 205.683037] RAID1 conf printout: [ 205.684699] --- wd:1 rd:2 [ 205.685972] disk 0, wo:0, o:1, dev:pmem0s [ 205.687562] disk 1, wo:1, o:1, dev:pmem1s [ 205.691717] md: recovery of RAID array md0 Fixes: c7bfced9a6 ("md: suspend i/o during runtime blk_integrity_unregister") Cc: <stable@vger.kernel.org> Cc: Mike Snitzer <snitzer@redhat.com> Reported-by: NeilBrown <neilb@suse.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: NeilBrown <neilb@suse.com>		2016-01-14 11:49:57 +11:00
..
bcache	Merge branch 'for-4.4/io-poll' of git://git.kernel.dk/linux-block	2015-11-10 17:23:49 -08:00
persistent-data	dm btree: fix bufio buffer leaks in dm_btree_del() error path	2015-12-10 10:30:18 -05:00
bitmap.c	md-cluster: Use a small window for resync	2015-10-12 01:32:05 -05:00
bitmap.h	md-cluster: Use a small window for resync	2015-10-12 01:32:05 -05:00
dm-bio-prison.c	block: add a bi_error field to struct bio	2015-07-29 08:55:15 -06:00
dm-bio-prison.h	dm bio prison: add dm_cell_promote_or_release()	2015-05-29 14:19:06 -04:00
dm-bio-record.h
dm-bufio.c	dm: convert ffs to __ffs	2015-10-31 19:06:01 -04:00
dm-bufio.h	dm snapshot: use dm-bufio prefetch	2014-01-14 23:23:03 -05:00
dm-builtin.c	dm sysfs: fix a module unload race	2014-01-14 23:23:04 -05:00
dm-cache-block-types.h	dm cache: revert "remove remainder of distinct discard block size"	2014-11-10 15:25:30 -05:00
dm-cache-metadata.c	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
dm-cache-metadata.h	dm cache: add fail io mode and needs_check flag	2015-06-11 17:13:00 -04:00
dm-cache-policy-cleaner.c	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
dm-cache-policy-internal.h	dm cache: age and write back cache entries even without active IO	2015-06-11 17:13:01 -04:00
dm-cache-policy-mq.c	dm: convert ffs to __ffs	2015-10-31 19:06:01 -04:00
dm-cache-policy-smq.c	dm: convert ffs to __ffs	2015-10-31 19:06:01 -04:00
dm-cache-policy.c	dm cache: add policy name to status output	2014-01-16 13:44:11 -05:00
dm-cache-policy.h	dm cache: age and write back cache entries even without active IO	2015-06-11 17:13:01 -04:00
dm-cache-target.c	dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()	2015-10-31 19:06:00 -04:00
dm-crypt.c	dm crypt: fix a possible hang due to race condition on exit	2015-11-19 13:38:30 -05:00
dm-delay.c	dm delay: document that offsets are specified in sectors	2015-10-31 19:06:05 -04:00
dm-era-target.c	dm persistent data: eliminate unnecessary return values	2015-10-31 19:06:02 -04:00
dm-exception-store.c	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
dm-exception-store.h	dm snapshot: add new persistent store option to support overflow	2015-10-09 16:57:03 -04:00
dm-flakey.c	dm: refactor ioctl handling	2015-10-31 19:05:59 -04:00
dm-io.c	dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()	2015-10-31 19:06:00 -04:00
dm-ioctl.c	char: make misc_deregister a void function	2015-08-05 10:35:49 -07:00
dm-kcopyd.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
dm-linear.c	dm linear: remove redundant target name from error messages	2015-10-31 19:06:03 -04:00
dm-log-userspace-base.c	dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()	2015-10-31 19:06:00 -04:00
dm-log-userspace-transfer.c	dm log userspace transfer: match wait_for_completion_timeout return type	2015-04-15 12:10:20 -04:00
dm-log-userspace-transfer.h
dm-log-writes.c	dm: refactor ioctl handling	2015-10-31 19:05:59 -04:00
dm-log.c
dm-mpath.c	dm mpath: fix infinite recursion in ioctl when no paths and !queue_if_no_path	2015-11-17 14:19:00 -05:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid1.c	Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm	2015-09-02 16:35:26 -07:00
dm-raid.c	dm raid: fix round up of default region size	2015-10-02 12:02:31 -04:00
dm-region-hash.c	dm: convert ffs to __ffs	2015-10-31 19:06:01 -04:00
dm-round-robin.c
dm-service-time.c
dm-snap-persistent.c	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
dm-snap-transient.c	dm snapshot: add new persistent store option to support overflow	2015-10-09 16:57:03 -04:00
dm-snap.c	dm snapshot: add new persistent store option to support overflow	2015-10-09 16:57:03 -04:00
dm-stats.c	dm stats: report precise_timestamps and histogram in @stats_list output	2015-08-18 17:20:03 -04:00
dm-stats.h	dm stats: support precise timestamps	2015-06-17 12:40:40 -04:00
dm-stripe.c	Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm	2015-09-02 16:35:26 -07:00
dm-switch.c	dm switch: simplify conditional in alloc_region_table()	2015-10-31 19:06:06 -04:00
dm-sysfs.c	dm: add 'use_blk_mq' module param and expose in per-device ro sysfs attr	2015-04-15 12:10:17 -04:00
dm-table.c	block: Inline blk_integrity in struct gendisk	2015-10-21 14:42:42 -06:00
dm-target.c	dm: allocate requests in target when stacking on blk-mq devices	2015-02-09 13:06:47 -05:00
dm-thin-metadata.c	dm thin metadata: fix bug when taking a metadata snapshot	2015-12-09 13:18:12 -05:00
dm-thin-metadata.h	dm thin metadata: add dm_thin_remove_range()	2015-06-11 17:13:04 -04:00
dm-thin.c	dm thin: fix regression in advertised discard limits	2015-11-23 14:54:46 -05:00
dm-uevent.c
dm-uevent.h
dm-verity.c	dm: refactor ioctl handling	2015-10-31 19:05:59 -04:00
dm-zero.c	block: add a bi_error field to struct bio	2015-07-29 08:55:15 -06:00
dm.c	dm: do not reuse dm_blk_ioctl block_device input as local variable	2015-11-17 14:18:49 -05:00
dm.h	block: kill merge_bvec_fn() completely	2015-08-13 12:31:57 -06:00
faulty.c	block: add a bi_error field to struct bio	2015-07-29 08:55:15 -06:00
Kconfig	raid5-cache: add crc32c Kconfig dependency	2015-11-09 09:09:52 +11:00
linear.c	block: kill merge_bvec_fn() completely	2015-08-13 12:31:57 -06:00
linear.h
Makefile	raid5: add basic stripe log	2015-10-24 17:16:19 +11:00
md-cluster.c	md-cluster: update comments for MD_CLUSTER_SEND_LOCKED_ALREADY	2016-01-06 11:39:21 +11:00
md-cluster.h	md-cluster: append some actions when change bitmap from clustered to none	2016-01-06 11:38:57 +11:00
md.c	md/raid: only permit hot-add of compatible integrity profiles	2016-01-14 11:49:57 +11:00
md.h	md/raid: only permit hot-add of compatible integrity profiles	2016-01-14 11:49:57 +11:00
multipath.c	md/raid: only permit hot-add of compatible integrity profiles	2016-01-14 11:49:57 +11:00
multipath.h
raid0.c	md/raid0: apply base queue limits *before* disk_stack_limits	2015-10-02 17:23:44 +10:00
raid0.h	block: kill merge_bvec_fn() completely	2015-08-13 12:31:57 -06:00
raid1.c	md/raid: only permit hot-add of compatible integrity profiles	2016-01-14 11:49:57 +11:00
raid1.h	md-cluster: Use a small window for resync	2015-10-12 01:32:05 -05:00
raid5-cache.c	raid5-cache: handle journal hotadd in quiesce	2016-01-14 11:49:43 +11:00
raid5.c	raid5-cache: add journal hot add/remove support	2016-01-06 11:39:57 +11:00
raid5.h	raid5-cache: IO error handling	2015-11-01 13:48:29 +11:00
raid10.c	md/raid: only permit hot-add of compatible integrity profiles	2016-01-14 11:49:57 +11:00
raid10.h	md/raid10: ensure device failure recorded before write request returns.	2015-08-31 19:43:45 +02:00